Crystal and molecular structure of copper(II) formate monourea

The local structure of molecular reaction intermediates at surfaces

“…This final structural conclusion, of course, means that the geometry of the formate-Cu surface bonding on both (100) and (110) surfaces that is actually very similar to that found in coordination chemistry, and is not some new type of bonding. Specifically, both the local metal-formate geometry and the associated Cu-O bondlengths are closely similar to those found in several copper formate complexes [19,20,21,22]. This re-interpretation of the adsorption geometry of formate on Cu(100) has also been supported by the results of cluster calculations [23].…”

Structure and Metal‐Metal Interactions in Copper(II) Carboxylate Complexes

“…Also, the large difference in Cu-Cu separation between the magnetically similar acetate and trifluoroacetate adducts demonstrates clearly that the metal-metal distance in these dimers is not an important factor in determining the strength of the interaction. This point has previously been made in other contexts (7,16,22,69). Finally, the substantial difference between the magnetic properties of anhydrous copper(I1) trifluoroacetate and \ FIELD (GAUSS) those of the dimeric quinoline adduct supports the view that the anhydrous salt does not have the bridged dimeric structure.…”

“…These magnetic results led logically to the structural question of whether the Cu-Cu distance or any other parameter of the presumed dimeric structure of the formate adducts could be correlated with their appreciably greater magnetic interaction in comparison to that in other alkanoates. A twodimensional study of the hemidioxan adduct of copper(I1) formate did not yield an unequivocal answer to this question (15); hence two further structural studies of copper(I1) formate adducts were undertaken, one in our laboratory (69) and one by Goodgame et al (22). The latter study involved a direct comparison of the structures and magnetism of the anionic thiocyanate adducts [Cu(OzCR)2 NCS]Z-~(R = H,CH3).…”

Synthesis, Spectroscopic and EPR Results and Crystal Structure of Copper(II) Formato Derivatives with Pyrazine and Dimethylpyrazines

“…The copper formato tetrahydrate Cu(HCOO) 2 ·4H 2 O consists of chains Cu(μ-HCOO) 2 (H 2 O) 2 linked by hydrogen bonds through additional water molecules [4]. It has not the binuclear unit, [Cu 2 (μ-HCOO) 4 ], similar to that of the copper acetate, but this is present in different complexes: molecular dimers as [Cu 2 (μ-HCOO) 4 (urea) 2 ] [5], [Cu 2 (μ-HCOO) 4 (dmso) 2 ] [6] and [Cu 2 (μ-HCOO) 4 (dmf) 2 ] [7], or chains of dimers as ...dioxaneϪ[Cu 2 (μ-HCOO) 4 ]ϪdioxaneϪ[Cu 2 (μ-HCOO) 4 ]Ϫ... [8].…”